Dual

Hi,
Raking the classroom classes that is integrated courses from 9th is your wish.
But you can clear IIT if you take two years integrated course and also for that you need to work hard managing both your IIT classes as well as board exams.
However you will study the main concepts and practices only from 11th and 12th grades only.
Joining in 9th makes you familiar with the FIIT-JEE atmosphere and faculty.

Symbiosis, Pune is a good choice. They have great internships and equally good placements.

Integrated M.Tech in Software Engineering awarded by UGC recognised university is vid for jobs both Government & Private and higher education in India & abroad. Placements will depend on Ranking of University or colleges and its earlier placement records.

B.Com+MBA (5-year) is a good course. Choose one of the best B-schools to pursue your career.

Yes, SRM do have dual degree program. B.Tech+MS, B.Tech+M.Tech, M.Tech+MBA.
All the best.

Advantage B.Tech-M.Tech dual degree is that you will be able to save one year but big disadvantage is that you will get struck with an Institute. If you do not select right Institute you do not have any corrections option available with you. If you do B.Tech from Tier 3, engineering college you can do M.Tech from top IIT by clearing GATE or do MS abroad.

IIT, Bangalore will give you even more exposure but in level of studies of IIIT, Allahabad is better.